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A top aide to Maricopa County Sheriff Joe Arpaio has requested an investigation of the sheriff's second-in-command, Chief Deputy David Hendershott, and two of his allies, signaling growing concern among the sheriff's top hierarchy about the agency's management.

The 63-page memorandum obtained by The Arizona Republic is the first clear inside account of a law-enforcement agency that is under investigation by the FBI and U.S. Attorney's Office for suspected abuses of power and has had considerable publicity about its failed corruption investigations into county officials and judges. Click here for the rest of the story.